{"title":"Conservative and Surgical Management of Unilateral and Bilateral Internuclear Ophthalmoplegia (INO)-A Retrospective Analysis.","authors":"Joshua Simmons, Martin Rhodes","doi":"10.22599/bioj.280","DOIUrl":"https://doi.org/10.22599/bioj.280","url":null,"abstract":"<p><strong>Aim: </strong>To report the outcomes of the natural progression and ophthalmic treatment of patients reviewed in a tertiary hospital trust with unilateral or bilateral internuclear ophthalmoplegia.</p><p><strong>Method: </strong>A retrospective case note analysis was performed and 33 patients diagnosed with unilateral or bilateral internuclear ophthalmoplegia (INO) were identified. The diagnosis, aetiology, presence of diplopia, ophthalmic management options and progression were recorded and analysed. This included both conservative and surgical management.</p><p><strong>Results: </strong>The most common aetiologies of INO within this cohort were stroke/ischaemic (69.7%) and multiple sclerosis (MS) (30.3%). Unilateral INO was more prevalent than bilateral INO, with 20 cases (60.6%) compared to 13 cases (39.4%), respectively. A higher proportion of unilateral INO were attributed to stroke (90%) whilst a higher proportion of bilateral INO were attributed to MS (61.5%). The most prescribed management at primary assessment was occlusion (45.5%) and prisms (24.2%). Some patients required no orthoptic intervention (30.3%). Two patients had surgical management of strabismus secondary to bilateral INO.</p><p><strong>Conclusion: </strong>Occlusion was the most common form of management for symptomatic relief of diplopia. Patients who presented at the first visit with no symptoms were unlikely to need any orthoptic intervention. Of the two patients who went on to require surgical intervention, restoration of binocular single vision (BSV) was achieved post-operatively with the use of a Fresnel prism. However, the differences in both surgical technique and number of surgeries required make this difficult to generalise. Additional research is needed to further explore the surgical management of INO.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"152-158"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9650975/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40481411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jessica E Francis, Martin Rhodes, Joshua Simmons, Jessy Choi
{"title":"Utilising Virtual Clinics and Orthoptists to Aid COVID-19 Service Recovery in Adult Strabismus.","authors":"Jessica E Francis, Martin Rhodes, Joshua Simmons, Jessy Choi","doi":"10.22599/bioj.273","DOIUrl":"https://doi.org/10.22599/bioj.273","url":null,"abstract":"<p><strong>Background: </strong>The Sheffield Virtual Adult Strabismus service was already well established and was put to real-time trial during the COVID-19 pandemic. We describe a multi-disciplinary adaptation to offer a safe and effective service delivery. We evaluate the efficacy of a virtual strabismus service during the pandemic to meet clinical demand, streamline patient care, balance care delivery and optimise medical input.</p><p><strong>Methods: </strong>Prospective data analysis from the virtual strabismus clinics dated from January 2015 to November 2021. All information was captured at first consultation with comprehensive specialist Orthoptic assessment and imaging; then reviewed by a strabismus consultant for clinical outcome. Management was discussed virtually with patients by the consultant.</p><p><strong>Results: </strong>Pre-COVID (January 2015-March 2020), 1,068 appointments were offered. During COVID (July 2020-November 2021), 442 appointments were offered. Clinical capacity increased to meet demand. Within two months of service re-opening, first appointment mean waiting time reduced below 18 weeks. During COVID, 24.6% of patients were listed for procedures after first visit. Face-to-face medical follow up for non-surgical cases reduced from 47.7% to 16.3%.</p><p><strong>Conclusion: </strong>Virtual strabismus services offer flexible, safe and effective ways to meet fluctuating referral patterns and maximise limited time and resources. Orthoptists are uniquely essential and highly valued keyworkers to conservatively manage non-surgical strabismus. Utilising the skillsets of Allied Health Professionals (AHPs) across the NHS is crucial to sustain ongoing clinical demand and patient care.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"144-151"},"PeriodicalIF":0.0,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9650973/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40481410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Claire Howard, Paul Knox, Helen Griffiths, Fiona Rowe
{"title":"Measurement of Saccade Parameters in Relation to Adaptation to Homonymous Hemianopia.","authors":"Claire Howard, Paul Knox, Helen Griffiths, Fiona Rowe","doi":"10.22599/bioj.272","DOIUrl":"https://doi.org/10.22599/bioj.272","url":null,"abstract":"<p><strong>Purpose: </strong>To report saccade parameters in participants during adaptation to post-stroke homonymous hemianopia.</p><p><strong>Methods: </strong>In a prospective observational case cohort study, adult stroke survivors with new onset homonymous hemianopia were recruited. Using quantitative measurement, saccade parameters were measured and compared between the hemianopic and non-hemianopic sides. Two participants with longitudinal measurements were compared with age-matched controls.</p><p><strong>Results: </strong>Of 144 clinical study participants, quantitative saccade measurements were only possible in 14 due to an inability to visualise targets on the hemianopic side in the majority. In 9 of the 14 participants, at four weeks post-stroke, mean (±SD) saccade latency was significantly longer to the hemianopic (328.4 ± 105.9 ms) compared to the non-hemianopic side (234.7 ± SD53.6 ms; <i>t</i> = 4.2, <i>df</i> = 8, <i>p</i> = 0.003). The number of correct saccadic responses out of 50 was significantly lower to the hemianopic side (36.6 ± SD14.1) in comparison to the non-hemianopic side (44.4 ± SD7.5; <i>t</i> = -3.1, <i>df</i> = 8, <i>p</i> = 0.014). In two participants studied over an eight-week time period, saccadic differences to the hemianopic side persisted despite apparent recovery of visual field.</p><p><strong>Conclusion: </strong>As participants with residual visual field loss were unable to perform quantitative assessments, the widespread use of this approach in this setting is limited. However, in those whom measurements were possible, there were statistically significant differences in saccade parameters between hemianopic and non-hemianopic sides that persisted post-visual recovery. Exploration of saccades in relation to adaptation to hemianopia and response to saccadic scanning/search training requires further examination.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":"18 1","pages":"130-143"},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9524296/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33514810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Comparison of the Incidence and Type of Ocular Motility Defects in Patients Presenting to Birmingham Midland Eye Centre Emergency Department during 2019 and 2020 to Assess the Impact of the Covid-19 Pandemic.","authors":"Jessica Edwards, Eilidh Russo, Rosie Auld","doi":"10.22599/bioj.258","DOIUrl":"https://doi.org/10.22599/bioj.258","url":null,"abstract":"<p><strong>Aim: </strong>This audit aimed to investigate whether COVID-19 had any impact on the incidence and type of ocular motility defects in patients presenting to Birmingham Midland Eye Centre (BMEC) Emergency Department (ED) during the COVID-19 pandemic in 2020 compared to the previous year.</p><p><strong>Methods: </strong>Medical records were reviewed for all patients presenting to BMEC ED during 2019 and 2020. Patients were classified depending on their diagnosis. The incidence and classification of ocular motility defect were analysed. Factors considered during analysis were number of presentations by year and month; COVID-19 tests; and pre-existing conditions.</p><p><strong>Results: </strong>Two hundred and twenty-one patients presented in 2019, and 260 patients in 2020, an increase in incidence of 17.6% was observed. One hundred and eighty-five patients were classified with new-onset neurogenic conditions in 2019, and 222 patients in 2020, an increase of 20.0%. In 2020, most patients presented in July, November, and December. Overall, there was a 91.3% increase in new-onset fourth cranial nerve palsies in 2020. Fifty-seven patients in 2020 had a Polymerase Chain Reaction COVID-19 test, of these 5 were COVID-19 positive.</p><p><strong>Conclusion: </strong>There was a higher incidence of ocular motility defects in 2020 compared to 2019. The majority of ocular motility defects were classified as neurogenic. It is difficult to attribute this increase to COVID-19 due to lack of testing and results, and confounding variables such as pre-existing conditions and lockdown restrictions. Some potential explanations for the change in presentations across the year of 2020 are proposed.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":"18 1","pages":"121-129"},"PeriodicalIF":0.0,"publicationDate":"2022-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9503892/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"33496051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anne Bjerre, Helen Griffiths, Martha Foulds, Gemma Arblaster
{"title":"Evaluation of the Nystagmus Information Pack.","authors":"Anne Bjerre, Helen Griffiths, Martha Foulds, Gemma Arblaster","doi":"10.22599/bioj.269","DOIUrl":"https://doi.org/10.22599/bioj.269","url":null,"abstract":"<p><strong>Introduction: </strong>In response to the need for easily accessible, high-quality information about nystagmus, the Nystagmus Information Pack was created and made freely available online in 2017. This study was undertaken to evaluate the content and accessibility of the Nystagmus Information Pack.</p><p><strong>Methods: </strong>Clinicians, eye clinic liaison officers (ECLOs), teachers, patients, families, and any person with an interest in nystagmus were invited to complete an online questionnaire about the content and accessibility of the Nystagmus Information Pack.</p><p><strong>Results: </strong>One hundred and sixty respondents completed the questionnaire. Respondents who had previously accessed the Nystagmus Information Pack (n = 49, 30.6%) reported the content was appropriate (86%), of sufficient detail (94%), and easy to understand (88%). Minor suggestions were made to improve the content. Respondents who had not accessed the Nystagmus Information Pack (n = 111, 69.4%) reported not being aware of the resource (90%) but had already accessed nystagmus information from a wide range of sources. Poor vision was a barrier to accessing the resource for a small number of respondents (4.5%).</p><p><strong>Conclusion: </strong>Some improvements to the content and accessibility of the Nystagmus Information Pack should be considered, in particular the format options in which it is available, to enable access in preferred formats and with poor vision. The availability of the Nystagmus Information Pack should be promoted and shared more widely, as the majority of respondents were unaware of the resource despite having an association with or interest in nystagmus.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"111-120"},"PeriodicalIF":0.0,"publicationDate":"2022-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9479666/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40389954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Change in Incidence and Severity of Abusive Head Trauma in the Paediatric Age Group Pre- and During COVID-19 Lockdown in the North East of England.","authors":"Thomas Salisbury, Neda Qurashi, Qasim Mansoor","doi":"10.22599/bioj.265","DOIUrl":"10.22599/bioj.265","url":null,"abstract":"<p><strong>Background: </strong><i>Abusive head trauma</i> (AHT) is currently the accepted terminology that encompasses previously used terms such as non-accidental injury (NAI) or non-accidental head injury (NAHI) and shaken baby syndrome (SBS). It is AHT and its ocular manifestations that ophthalmologists are vital in identifying and reporting.</p><p><strong>Objectives: </strong>To investigate whether there is a change in the incidence or severity of AHT pre- and during COVID-19 lockdown.</p><p><strong>Participants and settings: </strong>AHT cases reported between March-June 2019 and March-June 2020. Data will be collected from ***** **** ********* NHS Foundation Trust.</p><p><strong>Methods: </strong>A retrospective comparative study.</p><p><strong>Main outcome measures: </strong>Comparison of total number of children reported to child protection services pre- and during lockdown.Severity of reported cases.Ophthalmic involvement.</p><p><strong>Results: </strong>Of the pre-lockdown safeguarding referrals, 5/61 (8.19%) had confirmed AHT, and 4/40 (10%) of the during lockdown group were confirmed AHT. The absence of teachers was evident, as in the pre-lockdown group 40% (2) of referrals originated from schools compared to none during the lockdown period. Ophthalmic involvement was not present in any of the pre-lockdown cases and only 50% (2) of the during lockdown cases, with the appropriate proforma only used in one of these cases. Unfortunately, no further statistical testing was meaningful in light of the small sample size.</p><p><strong>Conclusions: </strong>The loss of the early warning detection mechanism provided by schools and health visitors may have contributed to both the change in presentation and severity of cases during the lockdown. There is also a need for ophthalmology and paediatrics to collaborate to ensure AHT cases are thoroughly investigated and documented.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"101-110"},"PeriodicalIF":0.0,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9414736/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40366770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anna O'Connor, Chloe King, Ashli Milling, Laurence Tidbury
{"title":"Using a Computerised Staircase and Incremental Optotype Sizes to Improve Visual Acuity Assessment Accuracy.","authors":"Anna O'Connor, Chloe King, Ashli Milling, Laurence Tidbury","doi":"10.22599/bioj.271","DOIUrl":"https://doi.org/10.22599/bioj.271","url":null,"abstract":"<p><strong>Background: </strong>Given the impact of visual acuity results on diagnosis and management, it is essential that the test is accurate, determined by factors such as test-retest variability. Standardisation improves accuracy, which can be performed via a computerised staircase methodology. Standard clinical tests with scoring of 0.02 per optotype implies an incremental score per optotype despite optotype size remaining constant on each line. The aim of this study is to establish if near continuous incremental optotype display and scoring improves test-retest variability compared to current testing methods.</p><p><strong>Methods: </strong>A computerised three up, one down adaptive staircase was used to display Kay Picture optotypes on an LCD monitor. Three methods of visual acuity assessment were undertaken: ETDRS, Kay Pictures and computerised Kay Pictures. Tests were performed twice under standard clinical conditions.</p><p><strong>Results: </strong>One hundred nineteen adults were tested. Test-retest variability for computerised Kay pictures was 0.01 logMAR (±0.04, p = 0.001). Good levels of agreement were observed for computerised Kay pictures in terms of test-retest variability, where the test had the smallest mean bias (0.01 logMAR compared to 0.03 and 0.08 logMAR for Kay Pictures and ETDRS respectively) and narrowest limits of agreement. Participants performed better in computerised Kay pictures than Kay Pictures by 0.03 logMAR, and better in ETDRS than computerised Kay pictures by 0.1 logMAR.</p><p><strong>Conclusion: </strong>Computerised Kay pictures exhibited a low test-retest variability, demonstrating it is reliable and repeatable. This repeatability measure is lower than the test-retest variability of the ETDRS and Kay Pictures tests.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"93-100"},"PeriodicalIF":0.0,"publicationDate":"2022-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9306677/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40594164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Characterizing Refractive Errors, Near Accommodative and Vergence Anomalies and Symptoms in an Optometry Clinic.","authors":"Samuel O Wajuihian","doi":"10.22599/bioj.267","DOIUrl":"https://doi.org/10.22599/bioj.267","url":null,"abstract":"<p><strong>Background: </strong>Refractive, accommodative and vergence parameters and associated anomalies cause symptoms of asthenopia. Patients consult eye care practitioners mainly due to symptoms they experience. To enhance targeted treatments from various anomalies, it is relevant to study symptoms with associating anomalies.</p><p><strong>Aim: </strong>To determine the frequencies of refractive error, accommodative and vergence anomalies, and their associations with symptoms in sample of Black South Africans.</p><p><strong>Method: </strong>This prospective, cross-sectional study comprised consecutive participants aged 10-40 years who attended the author's optometry practice in a Black population in South Africa. Visual acuity, refraction, accommodative and vergence tests were performed. Anomalies were classified as either single measure or syndromes based on the number of failed clinical signs.</p><p><strong>Results: </strong>Participants (n = 254) had mean age 22.6 ± 7.22 years. Ninety-four were male (37%) and 160 were female (63%). The frequencies of syndrome anomalies were accommodative insufficiency 17 [(6.6%) 95% CI 3.9-10.5%)], accommodative infacility 32 [(12.6%)] 8.7-17.3%] and convergence insufficiency 22 [(8.6%, 5.1-12.3%)]. Frequencies of coexisting anomalies were refractive error and accommodative 150 (60.0%), refractive error and vergence anomalies 136 (54.4%) and vergence and accommodative disorders 155 (62.0%). Most patients were symptomatic (70.9%). Headache was the most frequent symptom (41.1%).</p><p><strong>Conclusion: </strong>Accommodative anomalies were more frequent than refractive error and vergence anomalies. The high frequency of anomalies suggests a high uptake of optometric services for asthenopia. Accommodative anomalies were the most symptomatic. The study highlights the need for diagnosing visual symptoms and coexisting anomalies. Establishment of validated study protocols for all accommodative and vergence anomalies is recommended.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"76-92"},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9284986/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40644246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James Bould, Lauren Hepworth, Claire Howard, Jim Currie, Fiona Rowe
{"title":"The Impact of Visual Impairment on Completion of Cognitive Screening Assessments: A Post-Hoc Analysis from the IVIS Study.","authors":"James Bould, Lauren Hepworth, Claire Howard, Jim Currie, Fiona Rowe","doi":"10.22599/bioj.263","DOIUrl":"https://doi.org/10.22599/bioj.263","url":null,"abstract":"<p><strong>Aim: </strong>The aim of this study was to evaluate completed cognitive screens in stroke survivors with and without visual impairment to explore whether the presence of visual impairment impacts on completion of cognitive screening.</p><p><strong>Materials and methods: </strong>Cognitive screening assessment was undertaken using the Oxford Cognitive Screen (OCS). Data from visual function assessments (inclusive of visual acuity, visual fields, eye movements and visual perception evaluation) were analysed to determine whether presence and/or type of visual impairment impacted on cognitive screening scores achieved. Covariates, including glasses use, gender, age at stroke onset and stroke type, were used to assess confounding impacts on scores attained during cognitive screening.</p><p><strong>Results: </strong>1500 stroke admissions were recruited. One hundred ninety-seven who completed the OCS, were identified from the IVIS study database. Those who reported visual symptoms performed worse statistically on all cognitive tasks except the recall recognition (p = 0.232) and executive tasks (p = 0.967). Visual symptoms did not prevent participants from completing every section of the OCS (p = 0.095). In certain tasks, those not wearing their required glasses performed worse, including the executive function (p = 0.012), broken hearts and sentence reading tasks.</p><p><strong>Conclusions: </strong>Many tasks within cognitive screening assessment are impacted by presence of visual deficits, and adjustments, where possible (e.g. good lighting, large print) should be used to facilitate completion of cognitive screening. It is important to ensure required reading correction is worn during screening.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"65-75"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9248994/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40520438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Changes to Visual Parameters Following Virtual Reality Gameplay.","authors":"Sanjog Banstola, Kerry Hanna, Anna O'Connor","doi":"10.22599/bioj.257","DOIUrl":"https://doi.org/10.22599/bioj.257","url":null,"abstract":"<p><strong>Introduction: </strong>Virtual reality (VR) gameplay is popular with a range of games and educational resources available. However, it puts high demands on the visual system. Current evidence shows conflicting impacts on visual parameters. Therefore, this study explores the changes to vision following VR gameplay.</p><p><strong>Methods: </strong>The study was conducted at the School of Health Sciences, University of Liverpool. All participants had binocular vision with good visual acuity and no manifest strabismus. Participants were assessed before and after playing 15 minutes of the VR game Beat Saber, which incorporated convergence and divergence movements. Clinical assessments including near point of convergence (NPC) and near point of accommodation (NPA) using the RAF rule; accommodative convergence to accommodation (AC/A) ratio; motor fusion using the prism fusion range (at 33cm), accommodation facility using +2.00/-2.00DS flipper lenses, and stereoacuity using the Frisby stereo test were assessed before and after playing.</p><p><strong>Results: </strong>Seventy-eight participants (19-25 years old) were included in the study, with 16 males and 41 females respectively. The breakpoint of convergence reduced by 0.5 cm (p = 0.001). The binocular accommodative facility improved by 2 cycles per minute (cpm); p = 0.004. The mean, near horizontal prism fusion range (PFR) base break and recovery points both worsened by of 5.0 dioptres (p = 0.003), whereas the mean near horizontal PFR base in recovery point improved by of 4.0 dioptres (p = 0.003).</p><p><strong>Discussion: </strong>The study validated previous findings as VR gameplay over-exercised and fatigued convergence muscles, but to a small degree. The VR experience improved the participants' ability to change focus quickly and improve accommodation, as well as the divergence function of the eye. However, as the participants were retested directly after the VR gameplay, the findings were limited to short term effects on vision.</p>","PeriodicalId":36083,"journal":{"name":"British and Irish Orthoptic Journal","volume":" ","pages":"57-64"},"PeriodicalIF":0.0,"publicationDate":"2022-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9249003/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40520437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}